How do I open an eclipse gate on a mouse and keyboard?

[bketernalwings]

This may be a silly question, but I have been pressing buttons on both my mouse and keyboard, and I still cannot figure out how to open the eclipse gate. The in-game tutorial says to press LB. I am on chapter 3 and I am trying to open the eclipse gate to progress the main story.

[Korzic]

Page Up or Page Down, I can't remember which. This took me a while to figure out too, as the writing on the pictured key is practically illegible.

[Dex]

Page Up? Ouch, that's insanely unintuitive lol

[bketernalwings]

Thank you so much for the replies! :) It was the Page Up button. The writing was really hard to read, but of course it was the one button I did not try pressing.